1. CLI.—The stereoisomeric 2 : 3 : 5 : 6-tetramethylpiperazines. Part II. The configuration of the so-called β-isomeride Frederic Barry Kipping J. Chem. Soc. 1931 1160
2. 173. The stereoisomeric 2 : 3 : 5 : 6-tetramethylpiperazines. Part III. The reduction products of 2 : 3 : 5 : 6-tetramethylpyrazine methiodide Frederic Barry Kipping J. Chem. Soc. 1932 1336
3. CCCXCI.—The stereoisomeric 2 : 3 : 5 : 6-tetramethylpiperazines. Part I Frederic Barry Kipping J. Chem. Soc. 1929 2889